Insert Trigger

I am facing problem in creating a insert trigger for the following scenario.

i have transactions, control tables

whenever i insert a record in transactions it should get value from the control table, increment that value in control table and update the same value as transaction_id for new transaction in transaction table.

control table has these fields (control_desc, control_value)

can some one help me to write a trigger (insert trigger) in transactions table.

Tanks for the Help

Coudl you please provide more information like DDL code, showing which column you want to update etc.

HTH, jens Suessmeyer.

http://www.sqlserver2005.de

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Thanks for the replay

Fields in Transactions Table : trans_id,trans_type,amount,trans_date,uid

Fields in Control Table: id, id_value

I am inserting all the fields in transction table except trans_id when insert trigger fires i want to take id_value from control table which id is "trans_id" in id coulmn update the same in the trans_id field in transactiontable.

Can u help me reating this trigger.

Regards

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Try this

--<Run Once>

drop table Transactions

drop table control

go

create table control

(

control_desc varchar(5) not null primary key,

control_value int not null

)

create table Transactions

(

trans_id int not null identity,

control_desc varchar(5) not null foreign key references control(control_desc),

control_value int not null

)

go

create trigger ti_Transactions on Transactions for insert

as

set nocount on

update c

set c.control_value = c.control_value + 1

from control c

join inserted i

on i.control_desc = c.control_desc

go

insert control select 'ABCDE', 10001

go

--</Run Once>

--<Repeatable>

insert transactions (control_desc, control_value)

select control_desc, control_value

from control

where control_desc = 'ABCDE'

go

select * from control

select * from transactions

--</Repeatable>

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The following query may help you...

Code Snippet

create table control (
id int,
id_value int)

Go

create table Transactions (
trans_id int,
trans_type int,
amount float,
trans_date datetime,
uid uniqueidentifier)

Go

Insert Into control values(1,0)--Initiating the value

Go

Create Trigger Trg_Insert_Transactions
On Transactions For Insert
As
Begin
SET NOCOUNT ON;
Declare @.Id as int;

Update control WITH (ROWLOCK)
Set
@.Id = Id_value = (Id_Value +1)
Where
id =1;
Update Transactions
Set
trans_id = @.Id
Where
uid = (Select Uid From Inserted)
End

Go

Insert Into Transactions values(null, 1, 10,getdate(),newid())

GO

select * from Transactions
select * from control

sql